Handle parser errors from handlebars
Handle parser errors from handlebars

fixes #47

whynotmatt/express-hbs,WY08271/express-hbs,prosenjit-itobuz/express-hbs,whynotmatt/express-hbs,ezzygemini/express-hbs,barc/express-hbs,prosenjit-itobuz/express-hbs,AnliHuer/express-hbs,barc/express-hbs,AnliHuer/express-hbs,ezzygemini/express-hbs,WY08271/express-hbs